Movincool CMW30 - Self-Diagnostic Codes

Repair Section
48
8.2 Self-Diagnostic Codes
• Self-diagnostic codes are displayed on the WMC and indicate by LED on the relay board under
the following conditions. Refer to the troubleshooting chart on page 53 to 57 for the remedies.
• LED on the relay board indicates self-diagnostic codes for the MWT under the following
conditions. Refer to the troubleshooting chart on page 53 to 57 for the remedies.
• LED #7 (green) on the relay board turns on when the power is supplied to the unit.
Self-Diagnostic
Code
Possible Cause
Alarm
Pattern
Relay Board
LED (Red turns on)
Warning
Signal
Output
Detection Contents
User
Mode
Service
Mode
1 2 3 4 5 6
AL AL Fire alarm input 1  
ON
When receiving fire alarm
signal input.
PU PU
Condensation overflow
(Internal drain pump)
3 
When drain pan float switch
is OFF continuously for 60
seconds.
E07 E07
Condensation overflow
(Optional condensate
pump)
3 
When optional drain pan float
switch is OFF continuously
for 60 seconds.
HP HP
High-pressure signal
detected
-
OFF
When high-pressure switch is
activated 2 times in 24 hours
from first detection.
ON
When high-pressure switch is
activated 3-7 times in 24
hours from first detection.
High-pressure
protection activated
4 
When high-pressure switch is
activated 8 times in 24 hours.
E01 E01
WMC room thermistor
(RTS1) failure
2
 
When an abnormality is
detected.
E02 E02
Evaporator inlet air
thermistor (RTS2) failure
 
E03 E03
Entering water
thermistor (EWTS)
failure

E04 E04
Condenser thermistor
(CTS1) failure

E05 E05
Evaporator pipe inlet
thermistor (CTS2) failure
 
E06 E06
Evaporator pipe outlet
thermistor (CTS3) failure

E08 E08
WMC communication
error
4 
When a communication error
between the relay board and
WMC continues for at least
10 seconds.